I think USUM is great if you haven't played SM, although I think the SM story ends in a better way than USUM.
About the complaints of handholding, I don't remember there being a lot of handholding, just that you're healed by NPCs too many times. And the amount of cutscenes at the beginning of the game. Maybe it's because of the Pokémon I used, but there were some parts in the game I couldn't just steamroll through. Just don't forget to turn the Exp. Share off.
>>36438521>Are there any post game content added too? I kind want to complete my trade list and recreate what I experienced in B2W2 like trading with alot of players and getting pokemons from around the worldI'm not really sure what you mean, but XY, ORAS and USUM all have a postgame mission that expands the playing time a little bit. I think the battle facilities of gen VII are pretty decent, just don't expect Battle Frontier tier.